Re: cross-compile alien

[Fabio Mascarenhas <mascarenhas@...>]

You might have more than one copy of either the C runtime or the Lua
runtime loaded. Are your lua51.exe, lua51.dll and Alien dlls linked
against msvcrt.dll? And are the alien.dlls and lua51.exe linked
against lua51.dll? Mixing different runtimes can lead to these weird
errors.

--
Fabio Mascarenhas


On Wed, Aug 18, 2010 at 2:49 PM, Martin <wtxnh-lua@yahoo.com.au> wrote:
> On Tue, Aug 17, 2010 at 03:49:09PM +0200, steve donovan wrote:
>> Did you use something like this?
>>
>> if alien.platform == "windows" then
>>    libc = alien.load("msvcrt.dll")
>> else
>>    libc = alien.default
>> end
>>
>> I remember having to make this edit for Alien to work on LfW with the
>> libc example
>>
>> steve d.
>
> When I changed libc.lua as you suggest it run a little further but it
> break  at line:
>
> local foo = libc.malloc(string.len("foo") + string.len("bar") + 1)
>
> wine reports an error:
>
> wine: Unhandled page fault on write access to 0x67a81fce at address 0x67a820d9 (thread 0009), starting debugger...
> Unhandled exception: page fault on write access to 0x67a81fce in 32-bit code (0x67a820d9).
> Register dump:
> [ omitted...]
>
> Backtrace show it crash at core.dll module.
>
>> You should use Makefile.win as a base (making the necessary changes to
>> work with the GNU tools in your cross-compilation toolchain) instead
>> of the regular Makefile. Building libffi for Windows does not use
>> configure && make, but uses the patched version of libffi in the win32
>> directory directly.
>>
>> --
>> Fabio Mascarenhas
>
> Now I created a Makefile.cross for cross-compilation (included below).
> File libffi/win32/win32.c refused to compile (it is customized for
> MS compilers I guess) so I used libffi/win32/win32.S file instead.
> Than it compiled and linked OK.
> But running libc.lua example crashed at the same line with same error
> as showed above.
> Perhaps my commands for compilation/linking in Makefile are wrong?
>
> Martin
>
> Makefile.cross file:
>
>
> CFLAGS=-O2 -DWINDOWS -I../installed/include -Ilibffi/win32
> LIBFFI_OBJ=libffi/win32/ffi.o libffi/win32/prep_cif.o libffi/win32/types.o libffi/win32/win32.o
>
> CROSS-PREFIX=i586-mingw32msvc-
> CC=${CROSS-PREFIX}gcc
> AR=${CROSS-PREFIX}ar
> RANLIB=${CROSS-PREFIX}ranlib
>
> all: src/alien/core.dll src/alien/struct.dll
>
> libffi/win32/ffi.o: libffi/win32/ffi.c
>        ${CC} $(CFLAGS) -DX86_WIN32 -c -o $@ $<
> libffi/win32/prep_cif.o: libffi/win32/prep_cif.c
>        ${CC} $(CFLAGS) -DX86_WIN32 -c -o $@ $<
> libffi/win32/types.o: libffi/win32/types.c
>        ${CC} $(CFLAGS) -DX86_WIN32 -c -o $@ $<
> libffi/win32/win32.o: libffi/win32/win32.S
>        ${CC} $(CFLAGS) -DX86_WIN32 -c -o $@ $<
>
> libffi/win32/libffi.a: $(LIBFFI_OBJ)
>        ${AR} cru libffi/win32/libffi.a $(LIBFFI_OBJ)
>        ${RANLIB} libffi/win32/libffi.a
>
> src/alien/core.dll: src/alien/core.c libffi/win32/libffi.a
>        ${CC} -shared -s $(CFLAGS) -L../installed -llua51 -o src/alien/core.dll src/alien/core.c libffi/win32/libffi.a
>
>
> src/alien/struct.dll: src/alien/struct.c
>        ${CC} -shared -s $(CFLAGS) -L../installed -llua51 -o src/alien/struct.dll src/alien/struct.c
>
> install:
>        mkdir -p ../installed/mods/clua/alien/
>        cp  src/alien/core.dll ../installed/mods/clua/alien/
>        cp  src/alien/struct.dll ../installed/mods/clua/alien/
>        mkdir -p ../installed/mods/lua/
>        cp  src/alien.lua ../installed/mods/lua/
> clean:
>        rm -f src/alien/*.dll
>        rm -f libffi/win32/libffi.a
>        rm -f $(LIBFFI_OBJ)
>
>